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aba1dd16 JH |
1 | /* |
2 | * This file is part of the PulseView project. | |
3 | * | |
4 | * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
20 | ||
21 | #include <extdef.h> | |
22 | ||
23 | #include <math.h> | |
24 | ||
25 | #include "analogsignal.h" | |
1b1ec774 JH |
26 | #include "pv/data/analog.h" |
27 | #include "pv/data/analogsnapshot.h" | |
01fd3263 | 28 | #include "pv/view/view.h" |
aba1dd16 JH |
29 | |
30 | using namespace boost; | |
31 | using namespace std; | |
32 | ||
33 | namespace pv { | |
34 | namespace view { | |
35 | ||
568b90d4 JH |
36 | const QColor AnalogSignal::SignalColours[4] = { |
37 | QColor(0xC4, 0xA0, 0x00), // Yellow | |
38 | QColor(0x87, 0x20, 0x7A), // Magenta | |
39 | QColor(0x20, 0x4A, 0x87), // Blue | |
40 | QColor(0x4E, 0x9A, 0x06) // Green | |
41 | }; | |
42 | ||
7c68ddae JH |
43 | const float AnalogSignal::EnvelopeThreshold = 256.0f; |
44 | ||
aca00b1e | 45 | AnalogSignal::AnalogSignal(pv::SigSession &session, sr_probe *const probe, |
cec48d16 | 46 | shared_ptr<data::Analog> data) : |
c0f86852 | 47 | Signal(session, probe), |
785fd8d1 JH |
48 | _data(data), |
49 | _scale(1.0f) | |
aba1dd16 | 50 | { |
cec48d16 | 51 | _colour = SignalColours[probe->index % countof(SignalColours)]; |
aba1dd16 JH |
52 | } |
53 | ||
f459c540 JH |
54 | AnalogSignal::~AnalogSignal() |
55 | { | |
56 | } | |
57 | ||
9a0cd293 JH |
58 | boost::shared_ptr<pv::data::SignalData> AnalogSignal::data() const |
59 | { | |
60 | return _data; | |
61 | } | |
62 | ||
785fd8d1 JH |
63 | void AnalogSignal::set_scale(float scale) |
64 | { | |
65 | _scale = scale; | |
66 | } | |
67 | ||
fe08b6e8 JH |
68 | void AnalogSignal::paint_back(QPainter &p, int left, int right) |
69 | { | |
70 | if (_probe->enabled) | |
71 | paint_axis(p, get_y(), left, right); | |
72 | } | |
73 | ||
74 | void AnalogSignal::paint_mid(QPainter &p, int left, int right) | |
aba1dd16 | 75 | { |
a8acb46e | 76 | assert(_data); |
2658961b | 77 | assert(right >= left); |
a8acb46e | 78 | |
01fd3263 JH |
79 | assert(_view); |
80 | const int y = _v_offset - _view->v_offset(); | |
81 | ||
82 | const double scale = _view->scale(); | |
83 | assert(scale > 0); | |
84 | ||
85 | const double offset = _view->offset(); | |
86 | ||
cec48d16 JH |
87 | if (!_probe->enabled) |
88 | return; | |
89 | ||
1b1ec774 | 90 | const deque< shared_ptr<pv::data::AnalogSnapshot> > &snapshots = |
a8acb46e JH |
91 | _data->get_snapshots(); |
92 | if (snapshots.empty()) | |
93 | return; | |
94 | ||
1b1ec774 | 95 | const shared_ptr<pv::data::AnalogSnapshot> &snapshot = |
a8acb46e JH |
96 | snapshots.front(); |
97 | ||
98 | const double pixels_offset = offset / scale; | |
9d28da5a | 99 | const double samplerate = _data->samplerate(); |
a8acb46e JH |
100 | const double start_time = _data->get_start_time(); |
101 | const int64_t last_sample = snapshot->get_sample_count() - 1; | |
102 | const double samples_per_pixel = samplerate * scale; | |
103 | const double start = samplerate * (offset - start_time); | |
2658961b | 104 | const double end = start + samples_per_pixel * (right - left); |
a8acb46e JH |
105 | |
106 | const int64_t start_sample = min(max((int64_t)floor(start), | |
107 | (int64_t)0), last_sample); | |
306d43a7 | 108 | const int64_t end_sample = min(max((int64_t)ceil(end) + 1, |
a8acb46e JH |
109 | (int64_t)0), last_sample); |
110 | ||
7c68ddae JH |
111 | if (samples_per_pixel < EnvelopeThreshold) |
112 | paint_trace(p, snapshot, y, left, | |
113 | start_sample, end_sample, | |
114 | pixels_offset, samples_per_pixel); | |
115 | else | |
116 | paint_envelope(p, snapshot, y, left, | |
117 | start_sample, end_sample, | |
118 | pixels_offset, samples_per_pixel); | |
119 | } | |
120 | ||
121 | void AnalogSignal::paint_trace(QPainter &p, | |
122 | const shared_ptr<pv::data::AnalogSnapshot> &snapshot, | |
123 | int y, int left, const int64_t start, const int64_t end, | |
124 | const double pixels_offset, const double samples_per_pixel) | |
125 | { | |
126 | const int64_t sample_count = end - start; | |
127 | ||
128 | const float *const samples = snapshot->get_samples(start, end); | |
a8acb46e JH |
129 | assert(samples); |
130 | ||
7c68ddae JH |
131 | p.setPen(_colour); |
132 | ||
d3758367 | 133 | QPointF *points = new QPointF[sample_count]; |
a8acb46e JH |
134 | QPointF *point = points; |
135 | ||
7c68ddae | 136 | for (int64_t sample = start; sample != end; sample++) { |
a8acb46e | 137 | const float x = (sample / samples_per_pixel - |
2658961b | 138 | pixels_offset) + left; |
d3758367 | 139 | *point++ = QPointF(x, |
7c68ddae | 140 | y - samples[sample - start] * _scale); |
a8acb46e JH |
141 | } |
142 | ||
306d43a7 | 143 | p.drawPolyline(points, point - points); |
a8acb46e | 144 | |
7c68ddae | 145 | delete[] samples; |
a8acb46e | 146 | delete[] points; |
aba1dd16 JH |
147 | } |
148 | ||
7c68ddae JH |
149 | void AnalogSignal::paint_envelope(QPainter &p, |
150 | const shared_ptr<pv::data::AnalogSnapshot> &snapshot, | |
151 | int y, int left, const int64_t start, const int64_t end, | |
152 | const double pixels_offset, const double samples_per_pixel) | |
153 | { | |
154 | using namespace Qt; | |
155 | using pv::data::AnalogSnapshot; | |
156 | ||
157 | AnalogSnapshot::EnvelopeSection e; | |
158 | snapshot->get_envelope_section(e, start, end, samples_per_pixel); | |
159 | ||
160 | if (e.length < 2) | |
161 | return; | |
162 | ||
163 | p.setPen(QPen(NoPen)); | |
164 | p.setBrush(_colour); | |
165 | ||
166 | QRectF *const rects = new QRectF[e.length]; | |
167 | QRectF *rect = rects; | |
168 | ||
169 | for(uint64_t sample = 0; sample < e.length-1; sample++) { | |
170 | const float x = ((e.scale * sample + e.start) / | |
171 | samples_per_pixel - pixels_offset) + left; | |
172 | const AnalogSnapshot::EnvelopeSample *const s = | |
173 | e.samples + sample; | |
174 | ||
175 | // We overlap this sample with the next so that vertical | |
176 | // gaps do not appear during steep rising or falling edges | |
177 | const float b = y - max(s->max, (s+1)->min) * _scale; | |
178 | const float t = y - min(s->min, (s+1)->max) * _scale; | |
179 | ||
180 | float h = b - t; | |
181 | if(h >= 0.0f && h <= 1.0f) | |
182 | h = 1.0f; | |
183 | if(h <= 0.0f && h >= -1.0f) | |
184 | h = -1.0f; | |
185 | ||
186 | *rect++ = QRectF(x, t, 1.0f, h); | |
187 | } | |
188 | ||
189 | p.drawRects(rects, e.length); | |
190 | ||
191 | delete[] rects; | |
192 | delete[] e.samples; | |
193 | } | |
194 | ||
aba1dd16 JH |
195 | } // namespace view |
196 | } // namespace pv |